The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 2009
Filed:
Feb. 25, 2005
Akira Akabane, Miyagi, JP;
Akira Akabane, Miyagi, JP;
Keihin Corporation, Tokyo, JP;
Abstract
In an electromagnetic fuel injection valve in which a non-magnetic cylinder is coaxially coupled at its front end to a rear end of a magnetic cylinder forming a portion of a valve housing to surround a portion of a movable core having a rear end face serving as a movable attraction face, and a stationary core having a front end face serving as a stationary attraction face is fitted and fixed at its front portion in a rear portion of the non-magnetic cylinder, so that the stationary attraction face is opposed to the movable attraction face, the stationary core () is fitted and fixed at its front portion in the non-magnetic cylinder (), so that it is in close contact with an inner surface of an intermediate portion of the non-magnetic cylinder () in a region corresponding to the stationary attraction face (), and an annular recess () having a flat portion () flush connected to the stationary attraction face () is provided in an inner surface of the non-magnetic cylinder () to form an annular chamber () between the annular recess () and an outer periphery of a rear portion of the movable core (). This makes it possible that the area of opposed faces of the stationary core and the movable core is set at a large value to the utmost, thereby preventing the accumulation and deposition of chips and a magnetic powder.